From 7cf899a4ea88e91bd5b1c323449037bdc6d067a7 Mon Sep 17 00:00:00 2001
From: Sheel Choksi <sheelchoksi@gmail.com>
Date: Sun, 9 Feb 2014 14:14:33 -0800
Subject: [PATCH] Special case printing -0

Use the 1/x trick to determine if a value is -0 and special case the
printing of it.

[closes #496]
---
 lib/jasmine-core/jasmine.js  | 2 ++
 spec/core/PrettyPrintSpec.js | 1 +
 src/core/PrettyPrinter.js    | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index ac4b279d..aa3340b7 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -1354,6 +1354,8 @@ getJasmineRequireObj().pp = function(j$) {
         this.emitScalar('undefined');
       } else if (value === null) {
         this.emitScalar('null');
+      } else if (value === 0 && 1/value === -Infinity) {
+        this.emitScalar('-0');
       } else if (value === j$.getGlobal()) {
         this.emitScalar('<global>');
       } else if (value.jasmineToString) {
diff --git a/spec/core/PrettyPrintSpec.js b/spec/core/PrettyPrintSpec.js
index 4e31e39c..7b7c21ab 100644
--- a/spec/core/PrettyPrintSpec.js
+++ b/spec/core/PrettyPrintSpec.js
@@ -11,6 +11,7 @@ describe("j$.pp", function () {
     expect(j$.pp(jasmine.undefined)).toEqual("undefined");
     expect(j$.pp(3)).toEqual("3");
     expect(j$.pp(-3.14)).toEqual("-3.14");
+    expect(j$.pp(-0)).toEqual("-0");
   });
 
   it("should stringify arrays properly", function() {
diff --git a/src/core/PrettyPrinter.js b/src/core/PrettyPrinter.js
index b3b6e80d..8a2dea8b 100644
--- a/src/core/PrettyPrinter.js
+++ b/src/core/PrettyPrinter.js
@@ -11,6 +11,8 @@ getJasmineRequireObj().pp = function(j$) {
         this.emitScalar('undefined');
       } else if (value === null) {
         this.emitScalar('null');
+      } else if (value === 0 && 1/value === -Infinity) {
+        this.emitScalar('-0');
       } else if (value === j$.getGlobal()) {
         this.emitScalar('<global>');
       } else if (value.jasmineToString) {